An interval steady-state multimedia aquivalence (ISMA) model of the transport and fate of chloridion in a surface flow constructed wetland system treating oilfield wastewater in China

By adopting the constructed wetland system of surface flow, the purification effects of different residence time of wastewater, different constructed wetland plants and their synergistic effect are studied in DO disposal in living wastewater. The results show that the best plant combination in purifying DO is that of Phragmites communis and Typha oriental,followed by that of Phragmites communis, and that of Arundo donax and Typha oriental is lowest.

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Effect of recirculation on organic matter removal in a hybrid constructed wetland system

Water Science & Technology ◽

10.2166/wst.2011.635 ◽

2011 ◽

Vol 63 (10) ◽

pp. 2360-2366 ◽

Cited By ~ 7

Author(s):

S. Ç. Ayaz ◽

N. Findik ◽

L. Akça ◽

N. Erdoğan ◽

C. Kınacı

Keyword(s):

Organic Matter ◽

Constructed Wetland ◽

Suspended Solids ◽

Flow System ◽

Pilot Scale ◽

Surface Flow ◽

Small Communities ◽

Anaerobic Reactors ◽

Wetland System ◽

Anaerobic Pretreatment

This research project aimed to determine the technologically feasible and applicable wastewater treatment systems which will be constructed to solve environmental problems caused by small communities in Turkey. Pilot-scale treatment of a small community's wastewater was performed over a period of more than 2 years in order to show applicability of these systems. The present study involves removal of organic matter and suspended solids in serially operated horizontal (HFCW) and vertical (VFCW) sub-surface flow constructed wetlands. The pilot-scale wetland was constructed downstream of anaerobic reactors at the campus of TUBITAK-MRC. Anaerobically pretreated wastewater was introduced into this hybrid two-stage sub-surface flow wetland system (TSCW). Wastewater was first introduced into the horizontal sub-surface flow system and then the vertical flow system before being discharged. Recirculation of the effluent was tested in the system. When the recirculation ratio was 100%, average removal efficiencies for TSCW were 91 ± 4% for COD, 83 ± 10% for BOD and 96 ± 3% for suspended solids with average effluent concentrations of 9 ± 5 mg/L COD, 6 ± 3 mg/L BOD and 1 mg/L for suspended solids. Comparing non-recirculation and recirculation periods, the lowest effluent concentrations were obtained with a 100% recirculation ratio. The effluent concentrations met the Turkish regulations for discharge limits of COD, BOD and TSS in each case. The study showed that a hybrid constructed wetland system with recirculation is a very effective method of obtaining very low effluent organic matter and suspended solids concentrations downstream of anaerobic pretreatment of domestic wastewaters in small communities.

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Pollutant removal capability of a constructed Melaleuca wetland receiving primary settled sewage

Water Science & Technology ◽

10.2166/wst.1999.0298 ◽

1999 ◽

Vol 39 (6) ◽

pp. 199-206 ◽

Cited By ~ 2

Author(s):

Keith G. E. Bolton ◽

Margaret Greenway

Keyword(s):

Constructed Wetland ◽

Surface Flow ◽

Pollutant Removal ◽

Organic P ◽

Tea Tree Oil ◽

Experimental Site ◽

Flow Rates ◽

Tea Tree ◽

Wetland System ◽

P Removal

This paper investigates the potential for constructed Melaleuca wetlands to provide buffering for sewage spills. The experimental site was a 4.5 m × 32 m surface flow constructed wetland planted with the tree species M. quinquenervia and M. alternifolia. Primary settled sewage was discharged into the wetland at flow rates of 300 and 600 lh−1, and the concentrations of commonly measured sewage pollutants were monitored at the inlet, middle, and outlet. The constructed wetland was an excellent sediment trap, with TSS removals of up to 98%. BOD5 and turbidity had correspondingly high removals of up to 93% and 97% respectively. At both flow rates there were was 100% reduction in faecal coliform. Nitrogen removal was dependent on the flow rate, with removals of 84% and 58% at 300 and 600 lh−1 respectively. Organic P removal was high, however the wetland system was a source of PO4-P. A conceptual model is presented for a constructed Melaleuca wetland designed for tea tree oil production, effluent polishing and emergency buffering for sewage spills.

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Performance assessment of horizontal and vertical surface flow constructed wetland system in wastewater treatment using multivariate principal component analysis

Ecological Engineering ◽

10.1016/j.ecoleng.2018.02.022 ◽

2018 ◽

Vol 116 ◽

pp. 121-126 ◽

Cited By ~ 12

Author(s):

Rashmi Verma ◽

Surindra Suthar

Keyword(s):

Principal Component Analysis ◽

Wastewater Treatment ◽

Performance Assessment ◽

Constructed Wetland ◽

Principal Component ◽

Component Analysis ◽

Vertical Surface ◽

Surface Flow ◽

Wetland System

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Seasonal efficiency of a hybrid sub-surface flow constructed wetland system in treating milking parlor wastewater at northern Hokkaido

Ecological Engineering ◽

10.1016/j.ecoleng.2012.12.054 ◽

2013 ◽

Vol 53 ◽

pp. 257-266 ◽

Cited By ~ 16

Author(s):

Pradeep Kumar Sharma ◽

Inoue Takashi ◽

Kunihiko Kato ◽

Hidehiro Ietsugu ◽

Kunihiko Tomita ◽

...

Keyword(s):

Constructed Wetland ◽

Surface Flow ◽

Wetland System

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Removal of pollutants from abattoir wastewater using a pilot-scale bamboo constructed wetland system

Environmental engineering ◽

10.37023/ee.7.2.4 ◽

2020 ◽

Vol 7 (2) ◽

pp. 70-74

Author(s):

Fidelis C. Nkeshita ◽

A. A. Adekunle ◽

R. B. Onaneye ◽

O. Yusuf

Keyword(s):

Removal Efficiency ◽

Constructed Wetland ◽

Urban Areas ◽

Low Cost ◽

Oxygen Demand ◽

Pilot Scale ◽

Surface Flow ◽

Green Technology ◽

Bambusa Vulgaris ◽

Wetland System

Wastewater from abattoir sources in urban areas can adversely affect the environment and cause health problems. This research investigated the ability of a bamboo constructed wetland system (BCWS) using Bambusa vulgaris, to treat wastewater from abattoir by removing nutrients and organics. This study adopted pilot scale reactors with bed dimension of 1 m length x 1 m width x 1 m depth to simulate a horizontal sub-surface flow constructed wetland and planted with six strands of bamboo plants. Parameters analyzed include the nutrients (in the form of phosphate and nitrate) and the organics (in the form of Chemical oxygen demand, COD and Biochemical oxygen demand, BOD). The effluent analysis that were carried out within a 28-day retention period showed that there was a very good decrease in the nutrient pollutant parameters; phosphate (99.6 %), nitrate (98.5 %). The organics showed a lesser performance with a 39.3 % removal efficiency for COD and 49.9 % removal efficiency for BOD. Bamboo can be used in a BCWS for low cost green technology in urban areas and can be improved upon by increasing the number of bamboo shoot in order to have a larger root system.

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